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Philips

74F640 Datasheet Preview

74F640 Datasheet

Octal bus transceiver / inverting 3-State

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INTEGRATED CIRCUITS
74F640
Octal bus transceiver, inverting (3-State)
Product specification
IC15 Data Handbook
1989 Nov 27
Philips
Semiconductors




Philips

74F640 Datasheet Preview

74F640 Datasheet

Octal bus transceiver / inverting 3-State

No Preview Available !

Philips Semiconductors
Octal bus transceiver, inverting (3-State)
Product specification
74F640
FEATURES
High-impedance NPN base inputs for reduced loading
(70µA in High and Low states)
Ideal for applications which require high-output drive and minimal
bus loading
Inverting version of 74F245
Octal bidirectional bus interface
3-State outputs sink 64mA and source 15mA
DESCRIPTION
The 74F640 is an octal transceiver featuring inverting 3-State bus
compatible outputs in both transmit and receive directions. The B
port outputs are capable of sinking 64mA and sourcing 15mA,
providing very good capacitive drive characteristics. The device
features an Output Enable (OE) input for easy cascading and
Transmit/Receiver (T/R) input for direction control. The 3-State
outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.
PIN CONFIGURATION
T/R 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
20 VCC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
SF00198
TYPE
74F640
TYPICAL
PROPAGATION
DELAY
3.5ns
TYPICAL SUPPLY CURRENT
(TOTAL)
78mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
20-pin plastic DIP
N74F640N
20-pin plastic SOL
N74F640D
PKG DWG #
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
A0 - A7, B0 - B7
Data inputs
OE Output Enable input (active Low)
T/R Transmit/Receive input
A0 - A7
A port outputs
B0 - B7
B port outputs
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
74F(U.L.)
HIGH/LOW
3.5/0.115
2.0/0.067
2.0/0.067
150/40
750/106.7
LOAD VALUE
HIGH/LOW
70µA/70µA
40µA/40µA
40µA/40µA
3.0mA/24mA
15mA/64mA
1989 Nov 27
2 853–0381 98171


Part Number 74F640
Description Octal bus transceiver / inverting 3-State
Maker Philips
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74F640 Datasheet PDF






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